Dust-collector.



'No- 837,743. PATENTBD DEC. 4, 1906.

' W. W. SLY.

DUST COLLECTOR.

APPLIUATION FILED MAB..2Z. 1905.

2 SHEETS-SHEET 1.

GA3 i A' in vena?? Wzfzec'o'ek pATENTED DEG. 4. 1906.

i VW.. W. sLY.

DUST COLLECTOR. APPLIUATION FILEDA M-AB.22.1905.

Aing the screens, and

cl2, into which the WILLIAM W. sLY, or cLEVELAND, cino.

DUST-COLLECTOR. i

No. semi/4a.

Specification of Letters Patent.

PetentediDec. 4, 1906.

Application filed March 22,1905. Serial No. 251,369.

To LZ whom it may concern/ Be it known that I, IVILLIAM IV. SLY, acitizen of the United States, residing at Cleveland, in the county ofCuyahoga and State of Ohio, have invented a certain new and usefulImprovement in Dust-Collectors, of which the following is a full,clear,'and exact description, reference being had to the acconipanyingdrawings The object of this invention is to provide a simple and durabledust-collector wherein the screens shall be so arranged that it shall beim ossible for the dust to leak through into the c ean side of thecollector and there shall be el'icient means for shaking the screens tocause the dust to drop ofi' ofthe saine.

The invention, which is an improvement on my prior patent, No. 710,624,comprises the means for securing the screening-canvas in a dusftightmannerI the means for holdthe means for shaking them, all ol which ishereinafter moiefully described and which is deiinitely set out in theclaims.

In the drawings, Figure 1 is a vertical scction through mydust-collector, the same being broke-n away intermediately. Fig. 2 is aperspective view of the su )port for the screens. Fig. IS is a verticalcross-section through such support. Fig. f1 is a plan View, partlybroken away and sectioned, Vthrough some o the screens. Fig. 5 is avertical cross-section through the upper and lower portions el: thescreens, showing the method ot' securing the canvas. liig. (j is ahorizon tal cross-section through the screen at its exit side.

As shown in the drawings, A represents a suitable chamber which receivesthe dustladen air and carries the screens i'or removing the dust. Thescreens IS are placed vertically within thisl chamberside by side insuch a way that their abutting edges constitute a partition dividing thechamber into the receiving portion (L and the exit portion 11.. At thebase ofthe receiving portion is :i hopper dust descends. A suitableopening a3 allows the entrance ol' the duste laden air into thereceiving-chambcr, and an opening a* allows the removal ol the Asuitable suction-ian is connersed ith this opening. The onl;Y|mssnge-\\:.r lor'Y lhc nir from the chamber o is 'through te screens.

pure nir.

the air is filtered, the dust remaining on the outside of the screens.in the chamber o.

Each screen consists of a rectangular frame having top members b, bottommembers front vertical edges b2, and rear edges provided'by the membersb3. On 'opposite sides of this frame are secured sheets b4 of canvas.The horizontal members Z) and b el the frame are tapered toward apointaway from the end Where thescreens are secured, and there is thus leftb'etween the screens space at their free end, Aso that the air enters atthe bottom and top and at the free vertical edge of the screens, asindicated by The air then passes through the canvas Zr* and out throughthe opening b5 at the rear edge of the screen between the two framemembers b3. The dust is thus letton the outer side of the canvas b4 anddescends into the hopper, the pure air passing out through the openinga, The frame members b of successive screens abut each other vand aresecured together by staples 612, making acontinuous )artition across thechamber. A cloth padding b passes entirely around the outer edges of therear members 1) to make a dust -tight connection between them and withthe supports.

In ordefito shake loose thedust which col lects on the outer side of thecanvas b4, I provide a support for the screens' which is adapted to bevibrated, shaking the screen sufficiently to dislodge the dust. Thissupport consists of a horizontal board oi' pla te C, extending acrossthe chamber A and carrying on iis upper side a groove, in which thelower ends l1 ot the screen members l1 stand. rlhis groove 'may beprovided by an angle-iron e and n bar c behind it. 'llliis structure issnpported on springs c?, which rest on bottom board c. rlliel springsare U-shaped and face in opposite directions, being secured at suitableintervals between the boards c and blocks (A oii the under side of theboard C. By this ineansthe support may be given. an up-aiul-down motionas well as a forwardand-baek motion.

'lo allow the screens to move when the sn pport is lvibral ed, l securethe upper projectingr ei'idis til" the numbers b in a groove cai'- riedby n rross-bar l), which extends from side to sideol' .the casing and isguided in a bracket ([,fd'e'pciiding l`rom the rool' et thc clmmber. Thedust prevented from passthe arrows in Fig.

IOO

ing from 'one side ofthe chamber to the other at the supports by reasonof the canvas d.

and c, secured from: the-roof to thernernber and vertically across thesprings at the ase. Y

To vibrate'the screens, I mount on the board Cy bearings e, in which isjournaled a shaft E. This shaft is cut down eccentrically at its bearins, as shown at e', so thatl when it is rotate by a suitable belt-pulley(rietlshown) -it'is out of balance and itsY inertia I the'weight of' thedust'which' collects on them',

frame' in va very 'secure manner,

it is essential that-thecanvas'bbe held to the as VWell as in amannerwhich shall be'dust-tight.- This I accomplish` as-follows: In each 4oithe frame members bandi b"I make a groove b", and the carwasdsstretchedacross the 'trame andsecurely tacked thereto at if beyondl the grooves.Then -a Ipiece 0fcord is'forc'ed into the' groove, pressingtle canvasbeneath it, and thgfcord'istacked in' place in the groove. B'ythis-means the canvasis not only drawn verytight, but it is'securelyheld, so that the vibration/does not'shake it loose, 'and'it ismadedustLtightyso'thatfnodust can werk in between the' canvas; andthelframe members and pass into the screen.` At thefront'and back'- endsofthe screen' ther canvas is' tacked atbs to the respective members and'is then drawn tight and securely held by strips of wood 11, whichvare'secured in 'rabbeted edges of' the members b"x and b3,respectively.l A duets-tight and' effective securement; is* thusm'a'rleat these edges of the canvas.

Thesecurementlof the edges of thecanv-as in such'mann'er that it shallbetaut and dusttight and firmly held is'extremely-important,

fora considerable Weight of dust collects on the ,canvasyand the'vibration of the canvas with this dust on it causes considerablestrain.' If' theI canvas were at' `all slack, the ef'ect'of thevibration ywould bem-uch worse, andv if thesecurement were not ve tightthe canvaswould soon tear'loosesuihciently to let'dust ass into the'interior of the screen. I have ound by practice that' theV means sho-wn,and above'described are extremely el'lieient for the purpose intended.

By setting the cams of the screens in from the edge not only is itprotected against chaiing when sl'iipped, but 1n use clear space isprovided between the screens at their supported edge, so that the dustwill not clog at this point, but will pass down freely:

Having described my invention, I claim- 1. In a dust-collector, incombination a horizontal support mounted on springs and a series of'vertical screens mounted at their rear edges on said support.

2. In a dustcollector, in combination a pa/rcof horizontal'supports oneabove the otherl and onef mounted. on sprinvs, and a series' ofvert-ical screensl mountedl attheir rear edges on said supports.

3. In a .dust-collector, the combination of a casing', a series oisprings supported `'irom vthe iioor of the casing, a support restingupon said springs and extending across the casing and a series ofscreensin' dust-prooi contact along their'rearedges and supportedat'sa-id rear edges uponA said support.

4. In a dust collecto`r, theconrbination et a casing, a support) therein'extending across the same, a series of screens-resting u on saidsupportll and placed side-by side?, ami-having their abut-tin edgesforming: a partition across the casing; springs supported onthe Hoor ofthe casing"and interposed between itand the said support", a supportiort'he u per ends of the screens extending across t e casing' andflexible means for preventing the passagejof dust between said' supportand the loor and top ofthe casing,

5. In a dust-collector, the combination of a casing, a plurality ofrectangular yframes therein, the rear member of each having an o eningthrough it, screens sccured'to both sides of each of'said frames, ahorizontal support onWhic-hthe real ends of said frames are supported,springs upon which said support is supported, a screen ce secured at itsedges and spannimgglh they space occupied by said s rings, ahorizontalsupport engaging with t 1e tops oi' the rear part-soi' said rectanguiarframe, said upper support and connected with the casing, and a screenconnected with the roof oi thc casing and with thc upper support andspanningthe space between them. l

ln 'testimony whereof l ncreunto ui'lix my slgnaturc in the presence oftwo witnessesu Vi'l'lilrliibl il. Siri'.

Witnesses:

ALBERT l-I. Barns, l). E. Nixon.

a guide-bracket engaging with IOO

